This machine uses the relative motion between movable and fixed teeth disc,and the raw materials is grinded by the comprehensive actions such as impacted by teeth, friction, impact between raw materials. The crushed material can be discharged through the grinding chamber. Moreover, different size of granule or powder can be got through exchanging screen with different mesh. Its inner wall is processed finely, so it is smooth and level, which overcomes the shortcomings existed in the old model such as roughness, accumulated powder.